That looks like a great home to me, I would even given them a rock or something to climb on. Like the greenery. I always use greenery in my cages, I think they like it. Sometimes I see them play with it. You will have happy quails I am sure.

I had my buttons in something almost identical to this, the only problem I had was that they would try to jump out when I opened the top. I prefer something with a door. I bought a guinea pig cage on carigslist for $20 and it's working great so far.

Just cut some large holes in the top, and cover them with wire. Then when you open it, just open one side at a time. They will learn to move to the other side of the cage when you are in it. I have some of mine in a tote like that, and I don't even have to take them out of it to clean it.